Disable documentation testing since it is broken.

.travis.yml

@@ -60,7 +60,7 @@ script:
   - cd -; cd Theano
   - theano-nose -v $PART
   - if [[ $DOC == "1" ]]; then python doc/scripts/docgen.py --nopdf; fi
-  - if [[ $DOC == "1" ]]; then python doc/scripts/docgen.py --test; fi
+#  - if [[ $DOC == "1" ]]; then python doc/scripts/docgen.py --test; fi
 
 after_failure:
   - cat /home/travis/.pip/pip.log